/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2002,2004,2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.impl.dv.xs;

import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.XMLGregorianCalendar;

import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.dv.ValidationContext;

/**
 * Validator for &lt;gMonth&gt; datatype (W3C Schema Datatypes)
 *
 * @author Elena Litani
 * @author Gopal Sharma, SUN Microsystem Inc.
 * @version $Id: MonthDV.java,v 1.8 2010-11-01 04:39:47 joehw Exp $
 * @xerces.internal
 */

public class MonthDV extends AbstractDateTimeDV {

  /**
   * Convert a string to a compiled form
   *
   * @param content The lexical representation of gMonth
   * @return a valid and normalized gMonth object
   */
  public Object getActualValue(String content, ValidationContext context)
      throws InvalidDatatypeValueException {
    try {
      return parse(content);
    } catch (Exception ex) {
      throw new InvalidDatatypeValueException("cvc-datatype-valid.1.2.1",
          new Object[]{content, "gMonth"});
    }
  }

  /**
   * Parses, validates and computes normalized version of gMonth object
   *
   * @param str The lexical representation of gMonth object --MM with possible time zone Z or
   * (-),(+)hh:mm
   * @return normalized date representation
   * @throws SchemaDateTimeException Invalid lexical representation
   */
  protected DateTimeData parse(String str) throws SchemaDateTimeException {
    DateTimeData date = new DateTimeData(str, this);
    int len = str.length();

    //set constants
    date.year = YEAR;
    date.day = DAY;
    if (str.charAt(0) != '-' || str.charAt(1) != '-') {
      throw new SchemaDateTimeException("Invalid format for gMonth: " + str);
    }
    int stop = 4;
    date.month = parseInt(str, 2, stop);

    // REVISIT: allow both --MM and --MM-- now.
    // need to remove the following 4 lines to disallow --MM--
    // when the errata is offically in the rec.
    if (str.length() >= stop + 2 &&
        str.charAt(stop) == '-' && str.charAt(stop + 1) == '-') {
      stop += 2;
    }
    if (stop < len) {
      if (!isNextCharUTCSign(str, stop, len)) {
        throw new SchemaDateTimeException("Error in month parsing: " + str);
      } else {
        getTimeZone(str, date, stop, len);
      }
    }
    //validate and normalize
    validateDateTime(date);

    //save unnormalized values
    saveUnnormalized(date);

    if (date.utc != 0 && date.utc != 'Z') {
      normalize(date);
    }
    date.position = 1;
    return date;
  }

  /**
   * Overwrite compare algorithm to optimize month comparison
   *
   * REVISIT: this one is lack of the third parameter: boolean strict, so it
   *          doesn't override the method in the base. But maybe this method
   *          is not correctly implemented, and I did encounter errors when
   *          trying to add the extra parameter. I'm leaving it as is. -SG
   *
   * @param date1
   * @param date2
   * @return less, greater, equal, indeterminate
   */
    /*protected  short compareDates(DateTimeData date1, DateTimeData date2) {

        if ( date1.utc==date2.utc ) {
            return (short)((date1.month>=date2.month)?(date1.month>date2.month)?1:0:-1);
        }

        if ( date1.utc=='Z' || date2.utc=='Z' ) {

            if ( date1.month==date2.month ) {
                //--05--Z and --05--
                return INDETERMINATE;
            }
            if ( (date1.month+1 == date2.month || date1.month-1 == date2.month) ) {
                //--05--Z and (--04-- or --05--)
                //REVISIT: should this case be less than or equal?
                //         maxExclusive should fail but what about maxInclusive
                //
                return INDETERMINATE;
            }
        }

        if ( date1.month<date2.month ) {
            return -1;
        }
        else {
            return 1;
        }

    }*/

  /**
   * Converts month object representation to String
   *
   * @param date month object
   * @return lexical representation of month: --MM with an optional time zone sign
   */
  protected String dateToString(DateTimeData date) {
    StringBuffer message = new StringBuffer(5);
    message.append('-');
    message.append('-');
    append(message, date.month, 2);
    append(message, (char) date.utc, 0);
    return message.toString();
  }

  protected XMLGregorianCalendar getXMLGregorianCalendar(DateTimeData date) {
    return datatypeFactory
        .newXMLGregorianCalendar(DatatypeConstants.FIELD_UNDEFINED, date.unNormMonth,
            DatatypeConstants.FIELD_UNDEFINED, DatatypeConstants.FIELD_UNDEFINED,
            DatatypeConstants.FIELD_UNDEFINED,
            DatatypeConstants.FIELD_UNDEFINED, DatatypeConstants.FIELD_UNDEFINED,
            date.hasTimeZone() ? date.timezoneHr * 60 + date.timezoneMin
                : DatatypeConstants.FIELD_UNDEFINED);
  }
}
